Canadian Ca*na"di*an, a. Of or pertaining to Canada. -- n. A native or inhabitant of Canada. Canadian period (Geol.), A subdivision of the American Lower Silurian system embracing the calciferous, Quebec, and Chazy epochs. This period immediately follows the primordial or Cambrian period, and is by many geologists regarded as the beginning of the Silurian age, See the Diagram, under Geology.